Mining-machine



(Ndmoael.)

M. HARDSOCG.

MINING MACHINE.

y x Patented A11 7, 1823.

N. Pneus. rmm-Lmmpw. wmmgm n. c.

UNITED 4STAT/ES PATENT OFFICE,

MAR-TIN HARDSOCG, OFAVEBY, IOITA.v i

MINING-MACHINE.

SPECIFICATION forming part off-Letters Iratent No. 282,632, dated August 7, 1883.

To a/ZZ whom, t 7a2/ay concern:

n Be it known that I, MARTIN HARDsooG, of Avery, in thecounty of Monroe and State of Iowa, have invented `certain new and useful Improvements in Mining-Machines; and I Ydo hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to whichv the drill-frame- Similar letters of reference indicate corresponding parts in allthe figures.

My invention has relation to mining-machines; and it consists in the improved construction and combination of parts of the same, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates a frame forming bearings for a hollow sleeve, B, passing longitudinally through the frame, and for a short transverse crankshaft, C, providediat its inner end with a bev` el-pinion, D, which engages a bevel-pinion,'E,`

upon sleeve B.

The interior of sleeve B is polygonal, and the correspondingly-shaped head F of the drill-shaft G slides in the same and turns with it, while the screw-threaded drill-shaft turns in a female screw-threaded clamp, II, having two laterallyeXtending arms, I, which are straddled by the bifurcated lower end, J, of the side pieces of frame A. This clamp H consists of a body portion, K, from which the arms I extend, the inner portions of which are transversely perforated, and fit in between two sets of perforated laterally-extending lugs or ears, L,upon the hinged portion ofthe clamp,

where they are secured by two removable pintles, M. By removing one of these pintles the clamp maybe opened\ and the drill-shaft removed when desired.

The end of the drill-shaft is provided with a socket, N, secured to the end of the same,

Application ilediMayA, 17883. (No modol.)

andhaving two lugs, O, projecting from the inside of the socket diametrically opposite to. yeach other, near the open end of the same, 5 5 and the drill-bit I), which is preferably a spiral auger, may be inserted into the socket by simplyplacing the upper end of the spiral bit betweenthe two projections and screwing it into the socket, the two projections fitting in between the flanges of the auger. In this manner, if the bit breaks, the broken oil' portion having the point may be inserted into the socket and held there, as well as the entire bit, and it may be inserted or removed in a moment of time. fr

The point of the auger orbit is cut down in the center, so that the sharpened ends of the flanges will cut from the periphery of the bore instead of, as usually is the case, from 70 the center, whereby the result is accomplished that the bit will cut truer than where a central projection first enters the object to be bored, and the flanges cut the outer portions of the bore away, and that, there being `no point to be worn off, while, on the contrary, the wear upon vthe ends of the` flanges will sharpen the same, the bit will keep itself in good order for boring, and requires comparatively little sharpening.

To brace the drill when in operation I provide an adjustable standard, Q, consisting of an oblong frame, B, having two bearings, S and T, one at each end, and having a series of notches, w, in the edges of its two parallel 8 5 sides, V, which fit into the space between the ends of the side pieces of frame A in such a manner that the transverse arms upon the clamp may rest in one notch on each side. of frame B and be rocked in the same. 9o

Bearing S of frame Bis screw-threaded, and a screw-threaded pin, WV, having a transverse perforation, through which passes a rod, X, headed in both ends, ts into and turns in the same, and the outer end of the pin being pointed, it may be placed against an object, and the other end ofthe standard being placed against another object, the standard may be secured between the two objects by turning the pin W by means of rod X. A

A pin, Y, pointed at both ends, slides in the bearing T in the other end of the frame, and may be adjusted by means of a set-screw, Z, passing through the side of the bearing, and

IOO

bearing with its end against pin Y, and a long adjustable standard alone are used, the entire sleeve or thimble, a, pointed at its closed end,

slides upon the outer end of pin Y, and may be secured upon the same by means of a set screw, b.

It will be seen that by this construction of the standard it may be braced between two rigid objects by adjusting pin Y and sleeve a till it nearljr spans the space between the twoY Io objects, whereupon it may be finally secured by screwing pin W out until it bears firmly against the rigid object it is forced against, and that when the drill-frame is placed over the open portion of the standard the arms upon the clamp may be placed into any of the notches and the drill be adjusted in any direction, the latter rocking with the arms of -the clamp in the notches -upon the standard and the standard turning upon the pointed ends of 2o the screw-threaded pin and of the sleeve.

It will also be seen that by having the pointed sleeve sliding adjustably upon the doublepointed pin Y the sleeve may be removed where the space will not admit a standard of 2 5 the length it has with the sleeve, and the double-pointed pin may beslid back in its bearing, and when one point is worn out on the pin it may be reversed and the other point used.

The crank c upon the crankshaft is slotted 3b and slides with its slot upon the endofthe shaft, and may be adjustedupon the same'by- `means ofI a clamp, d, through the center ofY which the screw-threaded outer end, e, of the crank-shaft passes, and which clamps the sides of the crankand may be brought to bear-upon the crankV bytightening a thumb-nut, j', upon the screw-threaded end of the crank-shaft. This crank, with its clamp i and thumb-nut, may be removed from the crank-shaft v if i the 4o narrowness of the space where the drill is Vto be worked will not admit'of the crank-and the frame, with its gearing, being used, when the crank may be placed upon the upper end of the drill-shaft, which is reduced to form` two parallelsides,f, upon which the slotted portion ofthe crank slides, .which/thereupon may be secured by means of the clamp d and they thumb-nut, which isscrewed 'down upon theupper reduced and screw-threaded end of the 5o drill-shaft. When used in this manner, the

drill-shaft, with its crank, clamp H, and 4them frame and gearing being removed.,

It will be seen that byturning the crank the sleeve B will be rotated, and with it the drill shaft, which will turn in the screwthreaded clamp and be fed toward the work, its square head sliding inside the sleeve, as it also may be withdrawn out of the bore by reversing the motion.

Having thusdescribed my invention, I claim and desire to secure by Letters Patent of the United Statesl. The combination of the drill-shaft, having means for rotating and feeding it, and provided at its outer end with the socket N, having diametrically-opposite lugs- O projecting from its inner surface, with'the spirally-anged augenbit P, as-and for the purpose shown and set forth.

2'. -In a mining-machine, the standard, consisting of an oblongframe, forming a screwthreaded and a smooth bearing7 one in each end, and having means for adjusting the drill mechanism upon it, a'screw-threaded pointed pin passing' through the Screw-threaded bearing in the frame, and having a double-headed bolt passing through and sliding in its outer portion, a double-pointed pin sliding in.` the smooth bearing, and having a set-screw for adjusting it in the same, and a sleeve `or thimble pointed in its closed end and sliding-upon the outer end of the double-pointedpin, havinga set-screw for. adjusting it, as and for thel purpose shown and set forth.

3. In a mining-machine, thecombination of theclamp guiding the drill-shaft and having laterally-extending arms,- theadjustable standard-frame having notches in the side' pieces. for the vreception of the arms of the clamp, and `9o the rectangular frame forming bearings for the drill-operating mechanism, and having bifurcated lower` ends straddling the `clamp-arms outside the sides of the standardframe, as and for the purpose shownand setforth.

In testimony thatI claim the foregoing as my ownl have hereunto affixed my signature in presence of two witnesses.

MARTIN HARDSOCG.

Witnesses: Y

BENJAMIN MrLLEsoN, y JOHN L. ANDERSON. 

